Molecularly imprinted silica as a selective SPE sorbent for triazine herbicides

• Published in: Journal of separation science Vol. 33; no. 9; pp. 1319 - 1324
• Main Authors: Gomes Costa Silva, Raquel, Rosa Morais Vigna, Camila, Bottoli, Carla B.G, Collins, Carol H, Augusto, Fabio
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley-VCH Verlag 01.05.2010; WILEY-VCH Verlag; WILEY‐VCH Verlag; Wiley
• Subjects: Analytical chemistry; Atrazine; Biological and medical sciences; Chemistry; Chromatographic methods and physical methods associated with chromatography; Exact sciences and technology; Food industries; Fundamental and applied biological sciences. Psychology; Herbicides; Imprinted polymers; Juices; Materials selection; Molecularly imprinted sorbents; Ormosils; Other chromatographic methods; Silicon dioxide; Sol gel process; Sol-gel; Sorbents; Sugar industries; Solid phase extraction; Chemical analysis; HPLC chromatography; Silica; Chemical enrichment; Surface structure; Affinity adsorbent; Characterization; Sample preparation; Ormosils; Quantitative analysis; Trace analysis; Scanning electron microscopy; Sol-gel; Pesticides; Sugar juice; Contamination; Herbicide; Ultraviolet detector; Sol gel process; Residue; Morphology; Preparation; Triazine derivatives; Sugar cane; Molecular imprinting; Molecularly imprinted sorbents; Atrazine
• ISSN: 1615-9306; 1615-9314
• DOI: 10.1002/jssc.200900785

A molecularly imprinted organically modified silica was prepared through a simple sol-gel procedure and evaluated as a specific sorbent for SPE of triazine herbicides. The material proved to be highly selective for the template molecule, atrazine, as well as for other structurally related species such as simazine and propazine. The performance of this material was shown to be comparable with commercial acrylate-based molecularly imprinted polymers. The molecularly imprinted silica was applied for the determination of trace levels of the target triazine analytes in sugar cane juice (locally called "garapa").